So a lot of people don't like pigeons, but it's not like there's an easy way to get rid of them from urban areas - they breed too fast and food is too readily available.

So instead of banning the sale of pigeon feed in Trafalgar Square or whatever, why not try and supplant them within their ecological niche with a more beautiful, but equally stupid, bird? Like this one: http://en.wikipedia.org/wiki/Nicobar_Pigeon

Gotta be worth a try.